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app_vue/node_modules/eslint/lib/rules/implicit-arrow-linebreak.js

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+/**
+ * @fileoverview enforce the location of arrow function bodies
+ * @author Sharmila Jesupaul
+ */
+"use strict";
+
+const { isCommentToken, isNotOpeningParenToken } = require("./utils/ast-utils");
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+module.exports = {
+    meta: {
+        type: "layout",
+
+        docs: {
+            description: "enforce the location of arrow function bodies",
+            category: "Stylistic Issues",
+            recommended: false,
+            url: "https://eslint.org/docs/rules/implicit-arrow-linebreak"
+        },
+
+        fixable: "whitespace",
+
+        schema: [
+            {
+                enum: ["beside", "below"]
+            }
+        ],
+        messages: {
+            expected: "Expected a linebreak before this expression.",
+            unexpected: "Expected no linebreak before this expression."
+        }
+    },
+
+    create(context) {
+        const sourceCode = context.getSourceCode();
+        const option = context.options[0] || "beside";
+
+        /**
+         * Validates the location of an arrow function body
+         * @param {ASTNode} node The arrow function body
+         * @returns {void}
+         */
+        function validateExpression(node) {
+            if (node.body.type === "BlockStatement") {
+                return;
+            }
+
+            const arrowToken = sourceCode.getTokenBefore(node.body, isNotOpeningParenToken);
+            const firstTokenOfBody = sourceCode.getTokenAfter(arrowToken);
+
+            if (arrowToken.loc.end.line === firstTokenOfBody.loc.start.line && option === "below") {
+                context.report({
+                    node: firstTokenOfBody,
+                    messageId: "expected",
+                    fix: fixer => fixer.insertTextBefore(firstTokenOfBody, "\n")
+                });
+            } else if (arrowToken.loc.end.line !== firstTokenOfBody.loc.start.line && option === "beside") {
+                context.report({
+                    node: firstTokenOfBody,
+                    messageId: "unexpected",
+                    fix(fixer) {
+                        if (sourceCode.getFirstTokenBetween(arrowToken, firstTokenOfBody, { includeComments: true, filter: isCommentToken })) {
+                            return null;
+                        }
+
+                        return fixer.replaceTextRange([arrowToken.range[1], firstTokenOfBody.range[0]], " ");
+                    }
+                });
+            }
+        }
+
+        //----------------------------------------------------------------------
+        // Public
+        //----------------------------------------------------------------------
+        return {
+            ArrowFunctionExpression: node => validateExpression(node)
+        };
+    }
+};